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bezimeni [28]
3 years ago
15

this week Shauna practiced her saxophone for 25 minutes less than 3 times the number of minutes she practiced last week. if she

practiced m minutes last week, write an expression that represents how many minutes she practiced this week.
Mathematics
1 answer:
Ymorist [56]3 years ago
3 0

Answer:

3m - 25

Step-by-step explanation:

3m - 25 will represent how many minutes she practiced this week:

3m represents 3 times the number of minutes she practiced last week. Then, subtract 25 from this.

This will represent 25 minutes less than 3 times the number of minutes she practiced last week.

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If 35 gms of pure drug are contained in 150 mls, how many grams are contained in 75 mls?
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Answer:

17.5

Step-by-step explanation:

The ratio of "pure drug" to liquid is 35:150

Therefore to evaluate for 75 mls we get the ratio 75/2150 or simply 1/2

we can then multiply 35 by the ratio 1/2

35/2=17.5

State the answer

In 75 mls there are 17.5 grams of pure drug

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3 years ago
a sandwich shop has 60 stores and 70 percent of the stores are I California. How many stores are in California and Nevada
Aliun [14]

Answer:

The number of stores in California 42

The number of stores in Nevada 18

Step-by-step explanation:

Given as :

The total sandwich shop in California and Nevada = 60

The percentage of shop in California = 70%

So, The percentage of shop in Nevada = 100% - 70% = 30%

Let The number of stores in California = c

And The number of stores in Nevada = n

Now, According to question

The number of stores in California = 70% of the total number of shops

I.e c = \frac{70}{100} ×  total number of shops

Or, c =  \frac{70}{100} × 60

∴   c = \frac{70\times 60}{100}

or, c =   \frac{4200}{100}

or, c = 42

So, The number of stores in California = c =42

Again

The number of stores in Nevada = 30% of the total number of shops

I.e n = \frac{30}{100} ×  total number of shops

Or, n =  \frac{30}{100} × 60

∴   n = \frac{30\times 60}{100}

or, n =   \frac{1800}{100}

or, n = 18

So, The number of stores in Nevada = n = 18

Hence The number of stores in California 42

And The number of stores in Nevada 18   Answer

8 0
3 years ago
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